Issue 12, 2024

Nickel, copper, and zinc dinuclear helicates: how do bulky groups influence their architecture?

Abstract

The ligand design factors that may influence the isolation of metallosupramolecular helicates or mesocates still deserve to be investigated. In this sense, dinuclear nickel(II), copper(II) and zinc(II) compounds were obtained by electrochemical synthesis using a family of five Schiff base ligands, H2Ln (n = 1–5), derived from bisphenylmethane and functionalized with bulky tert-butyl groups in the periphery and ethyl groups in the spacer. Six of the new complexes were characterized by X-ray crystallography, thus demonstrating that the helicate structure is predominant in the solid state. 1H NMR studies were performed for the zinc complexes to analyze if the helical architecture of the metal complexes is retained in solution. These studies reveal that the presence of a tert-butyl group in the ortho position with respect to the OH group is an essential factor identified for the existence of a helicate conformation in solution.

Graphical abstract: Nickel, copper, and zinc dinuclear helicates: how do bulky groups influence their architecture?

Supplementary files

Article information

Article type
Paper
Submitted
30 Jan 2024
Accepted
26 Feb 2024
First published
06 Mar 2024
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2024,53, 5676-5685

Nickel, copper, and zinc dinuclear helicates: how do bulky groups influence their architecture?

S. Fernández-Fariña, M. Maneiro, G. Zaragoza, J. M. Seco, R. Pedrido and A. M. González-Noya, Dalton Trans., 2024, 53, 5676 DOI: 10.1039/D4DT00279B

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